Atmospherically controlled fueling system



NOV. 27, 1934. v Q YJUSTHEIM 1,982,107

ATMOSPHERICALLY CONTROLLED FUELING SYSTEM Filed May 23, 1951 ,fivenir.

Glare/me I J JMe [In Patented Nov. 27, 1934 UNITED STATES PATENT OFFICE ATMOSPHERICALLY CONTROLLED FUELING SYSTEM 1 Claim.

My invention relates to means for drawing the fuel from the supply tank of an internal combustion engine and transporting such fuel to the intake manifold of the engine, vaporized, and thoroughly carburetted for consumption in said engine.

A further object is to provide an atmospheric controlled fueling system in which the pressure of the atmosphere, varies the supply of fuel vaporized.

A still further object is to provide a fueling system in which a funnel shaped tube is used in the tank, having an air port therein above the level of the fuel, said port being open to the atmosphere and controlled by a valve to adjust the pressure or passage of air therethrough.

These objects I accomplish with the device i1- lustrated in the accompanying drawing in which similar numerals and letters of reference indicate like parts throughout the several views and as described in the specification forming a part of this application and pointed out in the appended claim.

In the drawing in which I have shown the best and most preferred manner of building my invention Figure 1 is a diagrammatic view of the device showing part of the intake manifold and parts of the device sectioned.

Figure 2 shows a valve control for the atmospheric pressure into the funnel shaped suction tube of the device.

In the drawing I have shown the intake manifold as A, the carburetion mixing portion of my device as B, and the fuel supply tank as C.

The carburetion portion of my device is of the draft type formed of a frusto-conical chamber 1, joined to an inverted frusto-conical chamber 2, by curved walls 3, with the lower end of the chamber 1 provided with a throttle control valve 4 mounted therein and with the end of the chamber secured to the open end of the intake manifold. The top end of the chamber 2 is provided with an air control valve 5. Ports 6 connect the tangential juncture of the wall 3 and the chamber 1 with an annular surrounding distributing chamber '7, and which chamber 7 is connected with a source of fuel or fuel vapor supply in the tank C by a lead line 8. The fuel tank as shown in Figure 1 is provided with an air tight closure cap or filler cap 9 and medially on the tank I provide a raised chamber section E of the tank G into the top of which I provide an air or atmospheric pressure inlet pipe 10 having a control valve 11 mounted therein to partially or completely open or close the pipe 10 as desired. In the bottom 12 of the fuel tank C I then form a depression 13 over which I support a tapered or funnel shaped tube 14, which tube is secured to the top of the chamber E of the tank and the lead line 8 is secured to the top of the chamber E in open connection with the bore of the tube 14. A port 15 is bored through the side wall of the tube 14 to allow for air pressure to enter thereinto. Into the bottom of the tube 14 I then direct an aerator pipe 15a having an aerator 16 secured on the bottom end thereof adapted to release air into the bore of the tube 14. The end of the pipe 15a is directed up and out through the top of the chamber section E of the tank and the top end of the pipe may be provided with an air cleaner if desired. The pipe 10 may also be provided with an air cleaner to insure only clean air entering the system.

In Figure 2 I have shown a modified form of controlling the atmospheric pressure into the conical tube 88 by surrounding the tube 88 by an annular chamber 89 and providing a lead pipe 90 from the atmosphere into open connection with the chamber 89 and a valve 91 controls the amount of air allowed to enter the pipe through ports 92 leading from the chamber 89 through the wall of the tube 88.

The operation of the device is as follows:

The suction from the motor is applied through the mixing chamber B and through the line 8 creating suction in the tube 14 and through the hole 15. This suction will raise the fuel in the tube 14 to the level of the port 15 and the pressure of the atmosphere can be controlled on the surface of the fuel in the tank by opening or closing the valve 11. When the valve is open the suction will raise the fuel higher, due to the atmospheric pressure on the surface of the fuel. Air will also be drawn down through the pipe 15a and released through the aerator 16 in the bottom of the tube 14 when the valve 11 is closed and the amount of air drawn through the pipe 15a will vary with the diameter of the pipe 3, the amount the valve 11 is open and the size of the port 15 in the wall of the tube 14. This air and fuel vapor will be drawn through the line 8 into the chamber '7 through the ports 6 into the bore of the chamber and thence to the engine through the manifold A.

Having thus described my invention I desire to secure by Letters Patent and claim:

In an atmospherically controlled fueling system the combination of a mixing chamber secured to the intake manifold of an engine; a lead line from said mixing chamber leading to the fuel supply tank; a conical tube through the top of said tank in open connection with said line and having the lower end spaced from the bottom of said tank; an aerator tube through said tank into the bottom of said tube; means to control the atmospheric pressure in said tank; a port in said conical tube; and means to control the atmospheric pressure and air allowed to pass through said port.

CLARENCE I. JUSTHEIM. 

